There’s something lurking under our porch

I’m not sure what it is, but whatever is hiding under our back deck has turned my dog in Barkley McBarkerson, and he never used to be one of those annoying dogs. Lately he barks all night long, and when he’s outside, he tries to climb under the deck. We’ve seen a bunny in the yard, so I hope that’s what’s under there. Because if it’s a giant snake or something, I don’t want my 5 pound dog out there trying to get it.
It’s now three in the morning, and I had to get up and let the mutt out because he spend a solid half hour barking his fool head off. Grrrrrr.Ever vigilant.